class HandlerTest

class HandlerTest extends UITestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'node_test_views',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_view_empty',
        'test_view_broken',
        'node',
        'test_node_view',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE, $modules = [
        'views_test_config',
    ]) : void {
        parent::setUp($import_test_views, $modules);
        $this->placeBlock('page_title_block');
        ViewTestData::createTestViews(static::class, [
            'node_test_views',
        ]);
    }
    
    /**
     * Overrides \Drupal\views\Tests\ViewTestBase::schemaDefinition().
     *
     * Adds a uid column to test the relationships.
     *
     * @internal
     */
    protected function schemaDefinition() {
        $schema = parent::schemaDefinition();
        $schema['views_test_data']['fields']['uid'] = [
            'description' => "The {users}.uid of the author of the beatle entry.",
            'type' => 'int',
            'unsigned' => TRUE,
            'not null' => TRUE,
            'default' => 0,
        ];
        return $schema;
    }
    
    /**
     * Overrides \Drupal\views\Tests\ViewTestBase::viewsData().
     *
     * Adds:
     * - a relationship for the uid column.
     * - a dummy field with no help text.
     */
    protected function viewsData() {
        $data = parent::viewsData();
        $data['views_test_data']['uid'] = [
            'title' => 'UID',
            'help' => 'The test data UID',
            'relationship' => [
                'id' => 'standard',
                'base' => 'users_field_data',
                'base field' => 'uid',
            ],
        ];
        // Create a dummy field with no help text.
        $data['views_test_data']['no_help'] = $data['views_test_data']['name'];
        $data['views_test_data']['no_help']['field']['title'] = 'No help';
        $data['views_test_data']['no_help']['field']['real field'] = 'name';
        unset($data['views_test_data']['no_help']['help']);
        return $data;
    }
    
    /**
     * Tests UI CRUD.
     */
    public function testUiCrud() : void {
        $handler_types = ViewExecutable::getHandlerTypes();
        foreach ($handler_types as $type => $type_info) {
            // Test adding handlers.
            $add_handler_url = "admin/structure/views/nojs/add-handler/test_view_empty/default/{$type}";
            // Area handler types need to use a different handler.
            if (in_array($type, [
                'header',
                'footer',
                'empty',
            ])) {
                $this->drupalGet($add_handler_url);
                $this->submitForm([
                    'name[views.area]' => TRUE,
                ], 'Add and configure ' . $type_info['ltitle']);
                $id = 'area';
                $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/{$type}/{$id}";
            }
            elseif ($type == 'relationship') {
                $this->drupalGet($add_handler_url);
                $this->submitForm([
                    'name[views_test_data.uid]' => TRUE,
                ], 'Add and configure ' . $type_info['ltitle']);
                $id = 'uid';
                $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/{$type}/{$id}";
            }
            else {
                $this->drupalGet($add_handler_url);
                $this->submitForm([
                    'name[views_test_data.job]' => TRUE,
                ], 'Add and configure ' . $type_info['ltitle']);
                $id = 'job';
                $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/{$type}/{$id}";
            }
            // Verify that the user got redirected to the handler edit form.
            $this->assertSession()
                ->addressEquals($edit_handler_url);
            $random_label = $this->randomMachineName();
            $this->submitForm([
                'options[admin_label]' => $random_label,
            ], 'Apply');
            // Verify that the user got redirected to the views edit form.
            $this->assertSession()
                ->addressEquals('admin/structure/views/view/test_view_empty/edit/default');
            $this->assertSession()
                ->linkByHrefExists($edit_handler_url, 0, 'The handler edit link appears in the UI.');
            // Test that the  handler edit link has the right label.
            $this->assertSession()
                ->elementExists('xpath', "//a[starts-with(normalize-space(text()), '{$random_label}')]");
            // Save the view and have a look whether the handler was added as expected.
            $this->submitForm([], 'Save');
            $view = $this->container
                ->get('entity_type.manager')
                ->getStorage('view')
                ->load('test_view_empty');
            $display = $view->getDisplay('default');
            $this->assertTrue(isset($display['display_options'][$type_info['plural']][$id]), 'Ensure the field was added to the view itself.');
            // Remove the item and check that it's removed
            $this->drupalGet($edit_handler_url);
            $this->submitForm([], 'Remove');
            $this->assertSession()
                ->linkByHrefNotExists($edit_handler_url, 0, 'The handler edit link does not appears in the UI after removing.');
            $this->submitForm([], 'Save');
            $view = $this->container
                ->get('entity_type.manager')
                ->getStorage('view')
                ->load('test_view_empty');
            $display = $view->getDisplay('default');
            $this->assertFalse(isset($display['display_options'][$type_info['plural']][$id]), 'Ensure the field was removed from the view itself.');
        }
        // Test adding a field of the user table using the uid relationship.
        $type_info = $handler_types['relationship'];
        $add_handler_url = "admin/structure/views/nojs/add-handler/test_view_empty/default/relationship";
        $this->drupalGet($add_handler_url);
        $this->submitForm([
            'name[views_test_data.uid]' => TRUE,
        ], 'Add and configure ' . $type_info['ltitle']);
        $add_handler_url = "admin/structure/views/nojs/add-handler/test_view_empty/default/field";
        $type_info = $handler_types['field'];
        $this->drupalGet($add_handler_url);
        $this->submitForm([
            'name[users_field_data.name]' => TRUE,
        ], 'Add and configure ' . $type_info['ltitle']);
        $id = 'name';
        $edit_handler_url = "admin/structure/views/nojs/handler/test_view_empty/default/field/{$id}";
        // Verify that the user got redirected to the handler edit form.
        $this->assertSession()
            ->addressEquals($edit_handler_url);
        $this->assertSession()
            ->fieldValueEquals('options[relationship]', 'uid');
        $this->submitForm([], 'Apply');
        $this->submitForm([], 'Save');
        $view = $this->container
            ->get('entity_type.manager')
            ->getStorage('view')
            ->load('test_view_empty');
        $display = $view->getDisplay('default');
        $this->assertTrue(isset($display['display_options'][$type_info['plural']][$id]), 'Ensure the field was added to the view itself.');
    }
    
    /**
     * Tests escaping of field labels in help text.
     */
    public function testHandlerHelpEscaping() : void {
        // Setup a field with two instances using a different label.
        // Ensure that the label is escaped properly.
        $this->drupalCreateContentType([
            'type' => 'article',
        ]);
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        FieldStorageConfig::create([
            'field_name' => 'field_test',
            'entity_type' => 'node',
            'type' => 'string',
        ])->save();
        FieldConfig::create([
            'field_name' => 'field_test',
            'entity_type' => 'node',
            'bundle' => 'page',
            'label' => 'The giraffe" label',
        ])->save();
        FieldConfig::create([
            'field_name' => 'field_test',
            'entity_type' => 'node',
            'bundle' => 'article',
            'label' => 'The <em>giraffe"</em> label <script>alert("the return of the xss")</script>',
        ])->save();
        $this->drupalGet('admin/structure/views/nojs/add-handler/content/default/field');
        $this->assertSession()
            ->assertEscaped('The <em>giraffe"</em> label <script>alert("the return of the xss")</script>');
        $this->assertSession()
            ->assertEscaped('Appears in: page, article. Also known as: Content: The giraffe" label');
    }
    
    /**
     * Tests broken handlers.
     */
    public function testBrokenHandlers() : void {
        $handler_types = ViewExecutable::getHandlerTypes();
        foreach ($handler_types as $type => $type_info) {
            $this->drupalGet('admin/structure/views/view/test_view_broken/edit');
            $href = "admin/structure/views/nojs/handler/test_view_broken/default/{$type}/id_broken";
            $text = 'Broken/missing handler';
            // Test that the handler edit link is present.
            $this->assertSession()
                ->elementsCount('xpath', "//a[contains(@href, '{$href}')]", 1);
            $result = $this->assertSession()
                ->elementTextEquals('xpath', "//a[contains(@href, '{$href}')]", $text);
            $this->drupalGet($href);
            $this->assertSession()
                ->elementTextContains('xpath', '//h1', $text);
            $original_configuration = [
                'field' => 'id_broken',
                'id' => 'id_broken',
                'relationship' => 'none',
                'table' => 'views_test_data',
                'plugin_id' => 'numeric',
            ];
            foreach ($original_configuration as $key => $value) {
                $this->assertSession()
                    ->pageTextContains($key . ': ' . $value);
            }
        }
    }
    
    /**
     * Ensures that neither node type or node ID appears multiple times.
     *
     * @see \Drupal\views\EntityViewsData
     */
    public function testNoDuplicateFields() : void {
        $handler_types = [
            'field',
            'filter',
            'sort',
            'argument',
        ];
        foreach ($handler_types as $handler_type) {
            $add_handler_url = 'admin/structure/views/nojs/add-handler/test_node_view/default/' . $handler_type;
            $this->drupalGet($add_handler_url);
            $this->assertNoDuplicateField('ID', 'Content');
            $this->assertNoDuplicateField('ID', 'Content revision');
            $this->assertNoDuplicateField('Content type', 'Content');
            $this->assertNoDuplicateField('UUID', 'Content');
            $this->assertNoDuplicateField('Revision ID', 'Content');
            $this->assertNoDuplicateField('Revision ID', 'Content revision');
        }
    }
    
    /**
     * Ensures that no missing help text is shown.
     *
     * @see \Drupal\views\EntityViewsData
     */
    public function testErrorMissingHelp() : void {
        // Test that the error message is not shown for entity fields but an empty
        // description field is shown instead.
        $this->drupalGet('admin/structure/views/nojs/add-handler/test_node_view/default/field');
        $this->assertSession()
            ->pageTextNotContains('Error: missing help');
        $this->assertSession()
            ->responseContains('<td class="description"></td>');
        // Test that no error message is shown for other fields.
        $this->drupalGet('admin/structure/views/nojs/add-handler/test_view_empty/default/field');
        $this->assertSession()
            ->pageTextNotContains('Error: missing help');
    }
    
    /**
     * Asserts that fields only appear once.
     *
     * @param string $field_name
     *   The field name.
     * @param string $entity_type
     *   The entity type to which the field belongs.
     *
     * @internal
     */
    public function assertNoDuplicateField(string $field_name, string $entity_type) : void {
        $this->assertSession()
            ->elementsCount('xpath', '//td[.="' . $entity_type . '"]/preceding-sibling::td[@class="title" and .="' . $field_name . '"]', 1);
    }

}